I have a hedgehog and a bearded dragon and they need the house to stay warm or they could die. I was living in the Midwest, it was 20 degrees outside, and suddenly my heater stopped working. It was one of those central heater with an air conditioner too. Anyways, I was glad I was home so my pets didn’t freeze to death. I always keep a box of hand-warmers around for emergencies but the temperature was dropping so fast that I didn’t feel they would be much help. I put on my heavy winter coat and put both of my pets inside the coat so that my body heat could keep them warm. In the meantime, I was trying to figure out what was wrong with the heater. The electricity was still on in the house. The thermostat was on and had batteries but the heater just would not kick on despite the falling temperatures. I called up my manager and he came over in about 2 hours. By now, it was freezing inside. He went right to the electrical box, flipped a few switches, and the heater roared back into life. I am so glad this was not a lengthy heater repair. My pets depend on the heater for their very lives. Soon, we were soaking up the heat and back to our daily lives warm and thankful for central heating. What did people do before they had heaters?